Battery charging control device and method of implementing the same

Abstract

The invention discloses a charging control method for adjusting a charging current of a charging device, including monitoring a working voltage of the charging device, wherein the working voltage includes a voltage difference between a charging voltage and a battery voltage; adjusting the charging current of the charging device dynamically according to the working voltage of the charging device to maintain a working power of the charging device within a predetermined power range.

1 . A charging control method for adjusting a charging current of a charging device, comprising:
 monitoring a working voltage of the charging device, wherein the working voltage comprises a voltage difference between a charging voltage and a battery voltage; and   adjusting the charging current of the charging device dynamically according to the working voltage of the charging device to maintain a working power of the charging device to be within a predetermined power range.   
     
     
         2 . The charging control method as claimed in  claim 1 , wherein when the battery voltage is set to a fixed voltage level, the step of dynamically adjusting the charging current of a charging device according to the working voltage of the charging device further comprise:
 determining a corresponding charging current of the charging voltage according to the relationships between the charging voltage and the charging current; and   adjusting the charging current of the charging device to the corresponding charging current of the charging voltage.   
     
     
         3 . The charging control method as claimed in  claim 2 , wherein the step of determining the corresponding charging current of the charging voltage according to the relationships between the charging voltage and the charging current comprises:
 determining the corresponding charging current of the charging voltage by referencing a predetermined look-up table storing the relationships between the charging voltage and the charging current, wherein   the predetermined look-up table comprises a plurality of voltage levels, and each of the voltage levels corresponds to a charging current level.   
     
     
         4 . The charging control method as claimed in  claim 2 , wherein the step of monitoring a working voltage of the charging device further comprises:
 monitoring a plurality of charging voltage levels within a predetermined time period; and   setting an average of the charging voltage levels as the charging voltage.   
     
     
         5 . The charging control method as claimed in  claim 2 , wherein before the step of adjusting the charging current of the charging device dynamically according to the working voltage of the charging device, the charging control method further comprises:
 determining a deviation of the charging voltage and adjusting the charging current of the charging device when the deviation of the charging voltage exceeds a deviation value threshold.   
     
     
         6 . The charging control method as claimed in  claim 1 , wherein when the charging voltage is a fixed voltage level, the step of dynamically adjusting the charging current of a charging device according to the working voltage of the charging device further comprises:
 determining a corresponding charging current of the battery voltage according to the relationships between the battery voltage and the charging current; and   adjusting the charging current of the charging device to the corresponding charging current of the battery voltage.   
     
     
         7 . The charging control method as claimed in  claim 6 , wherein the step of determining the corresponding charging current of the battery voltage according to the relationships between the battery voltage and the charging current comprises:
 determining the corresponding charging current of the battery voltage by referencing a predetermined look-up table containing the relationships between the battery voltage and the charging current, wherein   the predetermined look-up table comprises a plurality of voltage levels, and each of the voltage levels corresponds to a charging current level.   
     
     
         8 . The charging control method as claimed in  claim 6 , wherein the step of monitoring a working voltage of the charging device further comprises:
 monitoring a plurality of battery voltage levels within a predetermined time period; and   setting the battery voltage as an average of the plurality of the battery voltage levels.   
     
     
         9 . The charging control method as claimed in  claim 6 , wherein, before the step of adjusting the charging current of the charging device dynamically according to the working voltage of the charging device, the charging control method further comprises:
 determining a deviation of the battery voltage and adjusting the charging current of the charging device when the deviation of the battery voltage exceeds a deviation value threshold.   
     
     
         10 . The charging control method as claimed in  claim 1 , wherein the step of dynamically adjusting the charging current of a charging device according to the working voltage of the charging device further comprises:
 adjusting a duty cycle of the charging current of the charging device dynamically according to the charging voltage, the battery voltage, or the voltage difference between the charging voltage and the battery voltage.   
     
     
         11 . A charging control device, comprising:
 a voltage detection module, monitoring a working voltage of the charging device, wherein the working voltage comprises a voltage difference between a charging voltage and a battery voltage; and   a current adjusting module, dynamically adjusting a charging current of a charging device according to the working voltage of the charging device.   
     
     
         12 . The charging control device as claimed in  claim 11 , wherein when the battery voltage is set to a fixed voltage level, the voltage detection module detects the charging voltage; and
 the current adjusting module adjusts the charging current of a charging device dynamically according to the charging voltage of the charging device, wherein the current adjusting module comprises:
 a first current acquiring unit, determining a corresponding charging current of the charging voltage according to a relationship between the charging voltage and the charging current; and 
 a first current adjusting unit, adjusting the charging current of a charging device to the corresponding charging current of the charging voltage. 
   
     
     
         13 . The charging control device as claimed in  claim 12 , wherein the first current acquiring unit determines the corresponding charging current of the charging voltage by referencing a predetermined look-up table storing the relationship between the charging voltage and the charging current; wherein
 the predetermined look-up table comprises a plurality of voltage levels, and each of the voltage levels corresponds to a charging current level.   
     
     
         14 . The charging control device as claimed in  claim 12 , wherein the voltage detection module monitors a plurality of charging voltage levels in a predetermined time period, and sets the average of the charging voltage levels as the charging voltage. 
     
     
         15 . The charging control device as claimed in  claim 12 , wherein the current adjusting module further comprises:
 a first voltage determining unit, determining a deviation of the charging voltage;   wherein when the deviation of the charging voltage exceeds a deviation value threshold, the first current adjusting unit adjusts the charging current of the charging device to the corresponding current of the charging voltage.   
     
     
         16 . The charging control device as claimed in  claim 11 , wherein when the charging voltage is set to a fixed voltage level, the voltage detection module detects the battery voltage; and
 the current adjusting module adjusts the charging current of the charging device dynamically according to the battery voltage of the charging device, wherein the current adjusting module comprises:
 a second current acquiring unit, determining the corresponding charging current of the battery voltage according to a relationship between the battery voltage and the charging current; and 
 a second current adjusting unit, adjusting the charging current of the charging device to the corresponding charging current of the battery voltage. 
   
     
     
         17 . The charging control device as claimed in  claim 16 , wherein the voltage detection module is utilized for monitoring a plurality of battery voltage levels in a predetermined time period and sets the battery voltage as an average of the plurality of the battery voltage levels. 
     
     
         18 . The charging control device as claimed in  claim 16 , wherein the current adjusting module further comprises:
 a second voltage determining unit to determine a deviation of the battery voltage,   wherein the second current adjusting unit adjusts the charging current of the charging device dynamically to the corresponding charging current of the battery voltage when the deviation of the battery voltage exceeds a deviation value threshold.   
     
     
         19 . The charging control device as claimed in  claim 11 , wherein the current adjusting module dynamically adjusting the charging current of a charging device according to the working voltage of the charging device further comprises:
 adjusting a duty cycle of the charging current of the charging device dynamically according to the charging voltage, the battery voltage, or the difference between the charging voltage and the battery voltage, to maintain a working power of the charging device to be within a predetermined power range.   
     
     
         20 . A charging system, comprising a charging device and the charging control device as claimed in  claim 11  connecting to the charging device.